Welding-torch.



J. HARRIS.

WELDlNG TORCH.

APPLICATION FILED vac. n. 1914.

Patented Aug. 27, 1918.

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Juan far,

y of the detachable tips for the pipe, B de- To all whom it may concern:

'D STATESPA- JOHN HARRIS, OF CLEVELAND, OHIO, ASIGNOBTO CABBQ -HYDROGEN COMPANY OF AMERICA, 01 PITTSBURGH, PENNSYLVANIA, A CQ BPORA TION OF DELAWARE.

mums-rem Specification of Letters Patent.

Patented Aug. 2'7, 1918.

Application filed December 17, 1914. Serial No. 877,648.

- Be it known that 1, JOHN HARRIS, a citizen of the Unlted States, residing at Cleveland, in the county of Guyahoga and State of Ohio, have invented a certain new and" useful Improvement in Welding-Torches, of

which; the followin -is a full, clear,- and exact description, re erence being had to the accompanying drawin This invention re ates to burners or torches that are used for the purpose of what is knownas autogenous and ,heteroeneous welding, through the proper comustion of oxygen and anothergas in such proportions as will produce a neutral flame. The general objects of the invention are to provide a burner or torch of this character Which shallbe extremely eiiicient and which at the same time shall be equally convenient of operation. One of the important advantages of my invention resides in the fact that the -mixing-of oxygen with the combustible gas (as hydrogen) is accom lished entirely within the burner or pipe ltself-and without the necessity" for using a mixing box. A further object of the invention is to make each of these tips self contained whereby, when connected tothe handle part of the device, each tip will have an oxygen injector which will e of a capacity proportional to the tip orifice and the pressure of the gases used.

Still further and more generally speaking the invention maybe defined as consisting of the combinations of elements embodied inthe claims hereto annexed and illustrated in the drawings forming .part hereof wherein Figure 1 is a central longitudinal sectional .view of a burner or torch constructed in accordance with my invention; Fig. 2 is a rear end elevation of the burner or torch shown in Fig. 1; while Figs 3 and 4 are sectional details corresponding respectively to the lines 3-3 of Fig. land 4-4 of Fig.2. f

Describin by reference characters the various parts 1 lustrated herein, A denotes one notes the tubular handle and C a rear casting containing the valves which control the proportions of oxygen and combustible gas flame. Each tip A" comprises a combined burner and mixing tube 1 having its front en be d nwardly, as shown at 2. At

arranged to discharge into the tube 1. In

the rear end of the tube 1 is a bushing 9 the bore whereof is proportional to the orifice at the tip of the pipe or burner as well as being proportional to the pressure of the gases used in such pipe or burner.

Aslpreviously stated, the fitting 3 contains the bore 4 and the passageway 5 preferably having their rear ends in substantially the same plane. The rear end of each branch is threaded and is provided with a conical seat 10 adapted toreceive the complementarily shaped. end 11 of the 0011- I nection, said pipe. connections being indicated at 12 and .13 respectively, and each being secured to its respective branch by means of a shouldered nut 14. The pipe connections '12 and 13 are shown as threaded into a valve casing 15 having ports 16 and 17 controlled by a plug 18 having the passages 19 and 20 therein adapted to register with the ports 16 and 17 respectively. The rear end of the valve casing is provided with a cylindrical seat 21 for the front end of the casing 22 constituting the handle proper, the rear end of the casing fitting a corresponding seat 23 on the rear castin C. 24 and 25 denote conduits located within the handle 22 and communicating at their ends respectively with the ports 16 and 17 of the valve casing and at their rear' ends with passageways 26 and 27 in the rear casting C. These passageways leading to valve seats 28 and 29 respectively are controlled by valves substantially identical in construction with those described and claimed in my copend struction adetailed description of one will ing application No. 14,536, filed March 15, I

1915. As these valves are identical in consufiice for both and identical reference characters will be applied to the corresponding parts of the two valves. Each valve comprises generally a valve stem body 30 having a threaded portion 31"which is. fitted into the internally threaded bosses 32, 33 respectively. Each valve body has its inner end reduced, as shown at 34-, and provided with a spherical head 35 on which head thereis mounted a valve point 36, which point is adapted to cooperate with its seat (28 or 29) and having its outer end hollow to enable it to receive therewithin the spherical head at the end of the valve stem, the wall surrounding the recess thus between the valve stem and thevalve point.

- The advantagesfof this fconstruct-ion have been pointed out injconnecti'on with the copending' application 1 referred to hereinbee fore. and may not be elaboratedupon hereln.

The rear end of the 'casting' C is provided withv a pair'of, connections 37,38 leading respectively to jthe passageways '39 and 40 which are adapted -to supplythe gases admitted through'said connections to the pipes 24 and '25 when the valves in the bosses 32 and 33 shall have been opened. The connections 37 and 38 are shaped and in tended to receive flexible tubing for conducting oxygen and a combustible gas respectively thereto-the flexible tubing being omitted.

In operation, the valves 30 are adjusted to secure the proper amount and proper proportions between the oxygen and combustible gas and the valve 18' may 'then beconveniently opened bythe hand'of the operator which grasps the tubular handle 22. The flame burning from the orifice of the burner or blow pipe tip will be a neutral flame suitable for welding purposes, and the torch or burner illustrated herein is particularly well adapted for producing such a flame and in such condition as will enable the welding operation to be performed very quickly. When it is desired to vary thecapacity of the torch or burner, this variation can be readily accomplished by unscrewing the nuts 14, removing the particular tip which may have been secured in place by such nuts and substituting for such tip another tip of the required capacity. This new tip will have an injector nozzle and a bushing 9 which will be adapted for the proper proportions between the oxygen and combustible gas as well as being proportional to the capacity of the burner or tip. In operation, the valves 30 will be adjusted to the capacity of the particular tip that may be in use.

The foregoing torch or burner, while. extremely simple, is not only more efiicient in operation, but is adaptable for all ordinary incidents-of use wherein a large variety of separate burners or torches have been here- 1. In a device. of the kind described, the

combination, with a detachable burner tube, of a branched fitting to which said tube is attached, said fitting comprising a straight portion and'a curved portion communicating with the straight vortion, conduits connected to the branches 0? saidfitting, a valve common-to said conduits and independent valves arranged in the said conduits rearwardly of the first mentioned valve.

2. A device .of theki described xiii prisin in combination a casting having indepen ent valves arranged therein, conduits leadlng from said casting, a valve casing to which said conduits are connected, a valve in said casing common to both conduits, a

branched fitting comprising a straight portion and a curved portion communicating with said straight portion; an injector ar-' ranged in said straight portion and a de,

tachable burner pipe cdnnected to said,

branched 'fitting in line with the straight portion thereof.

'3. The combination, with a conduit, for a combustion-supporting fluid and a com duit for a combustible fluid, of a fitting having a bore adapted to register with and form alcontinuation of the first-mentioned conduit and a curved passageway communicating at its front end with said bore and adapted to register at its rear end with the other conduit, an injector in said bore, means for connecting the said conduits to the rear end of the bore and to the rear end of the. passageway, respectively, and a burner having a bushing in its rear end adapted to register with the injector and detachably connected to the front end of the fitting. v v

4-. The combination, with a pair of conduits, of a fitting having a bore adapted to registerwvith and form a continuation of one of said conduits and a branched passageway communicating at its front end with said bore and adapted to register at its rear end with the other ofsaid conduits, an in-.

jector in said bore, means for connectingthe said conduits to the rear end of the bore and the rear end of the passageway, respectivel y, and a burner adapted to register with the injector and detachably connected to the for a combustible fluid, of a fitting having a bore adapted to register with and form a continuation of the first-ment oned conduit and a passageway communicating with said bore and extending laterally and rearwardly therefrom and adapted to register at its rear ,end with the other conduit, an injector threaded into said bore and having its 'discharge'end at substantially the junction of the said bore and passageway,'.a burner connected to said fittmgin front of the junction of the said passageway andbore, a bushing in the rear portion-of said burner,

and. means for detachably connecting the rear end of said fitting with the aforesaid conduits.

6. The combination, wlth'a pair Or onduits, of a fitting having a bore adapted to registerwith and form a continuation of.

one of said conduits and a passageway com-' municating with said bore and extending laterally and rearwardlyj therefrom and adapted to register at its rear end with the other of said conduits, an injector in said bore and having its discharge end at substantially the junction of the said bore and passageway, a burner connected to said fitting in front of the junction of the said passageway and bore, and means for detachably connecting the said conduits to the rear of said fitting. v

7. 'A tip comprising a branched fitting havinga straight bore and a curved passageway extending rearwardly from the front of the passageway with the bore, and a burner having a bushing at the rear end thereof adapted to register with saidinjector. I

8. A tip comprising a branched fitting having a straight bore and a passageway ex-. tending angularly and rearwardly from said bore, an injector in said bore and having its discharge end at the junction of the passageway and bore, and a burner connected to the front end of said bore and having a bushing therein adapted to register with said injector. I

9. A tip comprising a fitting having a straight bore and a branch extending laterally and'rearwardly from said bore and having a passageway therethrough, an injector in the said bore with its front or discharge end substantially at the junction of said passageway and bore, and a burner connected to the front of said fitting beyond the junction of the passageway and bore and 

